Prepare phase failed:[ERROR]: The value of s_patch_service_name is not set correctly in atleast one of the context files.
Update Database Tier to Latest Code
Call env from APPS NOde
Execute the admkappsutil.pl utility to create the appsutil.zip file in <INST_TOP>/admin/out.
$ perl <AD_TOP>/bin/admkappsutil.pl
mv $INST_TOP/admin/out/appsutil.zip from Apps node to DB Node $ORACLE_HOME
Unzip the appsutil.zip file from DB Node $ORACLE_HOME
Run Autoconfig from DB Tier
Run Autoconfig from Apps Tier
Retry your prepare phase